4: Radio Programming
PRC1099A-MSOP 4-19
8. Calculate the actual time value of the start of your slot by adding the times
of previous slots. Refer to the sample net structure below.
9. Convert the slot start time to 10 millisecond increments. Example:
• ABC slot start time: 3.932 sec x 100 ms/sec =393.2 ms
• Round to a whole number of intervals: 393 intervals
• Slot start time for station ABC is 393 intervals
Net Size
Note 1
Net size refers to the length of time stations remain at a channel waiting for
replies. It is determined by multiplying the slot time by the total number of
slots. Because the PRC1099A is programmed to read in 10 ms increments, this
total must be converted to milliseconds by multiplying it by 100. The
maximum size of a net is 6553.4 milliseconds.
To determine the net size, use the example below. The figures used are taken
from the diagram above.
1. Take the slot time (3.932 seconds) and the total number of slots (5).
2. Calculate the net size by multiplying the slot time by the total number of
slots: 3.932 seconds x 5 = 19.66 seconds
3. Convert the net size to milliseconds:
19.66 seconds x 100 ms/sec = 1966 ms
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Reserved
3.932 sec
3.932 sec
ABC
3.932 sec
DATRONWLD
7.864 sec
DATRONWLD
3.932 sec
DEF
11.796 sec
DEF
3.932 sec
XYZ
15.728 sec
XYZ
3.932 sec
ABC
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